fix(core): correctly handle empty markdown links

Author: tgreyuk

.changeset/petite-onions-ring.md

@@ -0,0 +1,5 @@
+---
+'typedoc-plugin-markdown': patch
+---
+
+- Correctly handle empty markdown links (#836).

packages/typedoc-plugin-markdown/src/libs/markdown/link.ts

@@ -1,8 +1,11 @@
 /**
- *  The link element
+ * The link element
  * @param label The text to display for the link
- * @param url The url to link to
+ * @param url The URL to link to
+ * @returns A Markdown link if URL is provided, otherwise plain text
  */
-export function link(label: string, url: string | null) {
-  return `[${label.trim()}](${url || ''})`;
+export function link(label: string, url?: string): string {
+  const parsedUrl = url?.trim() || '';
+  const safeLabel = label.trim();
+  return parsedUrl.length ? `[${safeLabel}](${parsedUrl})` : safeLabel;
 }

packages/typedoc-plugin-markdown/test/__snapshots__/entryfiles/entryfiles.members.opts-2.entry-module-classes-ModuleClass.mdx.snap

@@ -2,7 +2,7 @@
 
 ***
 
-[@scope/entryfile]() / [entry-module](../../index.mdx) / ModuleClass
+@scope/entryfile / [entry-module](../../index.mdx) / ModuleClass
 
 # Class: ModuleClass
 

packages/typedoc-plugin-markdown/test/__snapshots__/entryfiles/entryfiles.members.opts-2.index.mdx.snap

@@ -2,7 +2,7 @@
 
 ***
 
-[@scope/entryfile]() / entry-module
+@scope/entryfile / entry-module
 
 # @scope/entryfile